OPTICAL WAVEGUIDES DERIVED FROM A COMBINATION OF POLY(PERFLUOROCYCLOBUTANES) AND POLYMERIC CYANATES

摘要

The present invention is directed to optical waveguides or waveguide systems , comprising at least (a) a first material which is a poly(perfluorocyclobutane), and in direct contact to this material, (b) a second material which is a polycyanate resin made from at least one aromatic difunctional cyanate of formula (I) wherein R1 to R8 are independently from each other hydrogen, optionally substituted C1-C10 alkyl, C3-C8 cycloalkyl, C1- C10 alkoxy, halogen, phenyl or phenoxy, the alkyl or aryl groups being unfluorinated, partly fluorinated or fully fluorinated, with the proviso tha t (I) carries at least 1 fluorine atom, and Z is a chemical bond, SO2, CF2 CH2 , CHF, CH(CH3), isopropylene, hexafluoroisopropylene, n- or iso-C1-C10 alkylen e which may be partly or fully fluorinated, O, NR9 whereby R9 is hydrogen or C 1- C10 alkyl, N=N, CH=CH, C(O)O, CH=N, CH=N-N=CH, alkyloxyalkylene having 1 to 8 carbon atoms, S, or Si(CH3)2, optionally in mixture with other components. Preferably, both the first and the second materials are in the form of a thi n layer, the layers directly adhered to each other. Either the waveguide can b e made from the first material and at least one of the buffer layer and the cladding layer can be made from the second material, or vice versa.